Seatbelt control device

A seatbelt control device for a seatbelt system,

• the seatbelt system comprising:
• a seatbelt configured to restrain a seated passenger at a seat;
• a spool configured to take up the seatbelt;
• an elastic member configured to impart to the spool a force making the spool rotate in a belt takeup direction when the seatbelt is pulled out;
• a motor configured to be able to operate forward and operate in reverse;
• and
• a force transmission mechanism configured to make the spool rotate in the belt takeup direction when making the motor operate forward and to disconnect the spool and the motor when making the motor operate in reverse, wherein
• the seatbelt control device comprises a kinesthetic warning control part configured to change a tightness of the seatbelt against the seated passenger to thereby warn the seated passenger kinesthetically by the seatbelt, and
• the kinesthetic warning control part comprises:
• a fitting operation part configured to perform a fitting operation controlling the time of making the motor operate forward based on the value of the current flowing through the motor when making the motor operate forward and controlling a tightness of the seatbelt to a predetermined initial belt tightness;
• and
• a kinesthetic warning operation part configured to perform a kinesthetic warning operation making the tightness of the seatbelt rise in stages from the initial belt tightness by repeating a forward operation making the motor operate forward and at least one operation of a braking operation short-circuiting terminals of the motor to render the motor a short brake state or a reverse operation making the motor operate in reverse, and
• the kinesthetic warning control part is configured to perform the fitting operation before performing the kinesthetic warning operation.